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BOSTON MARATHON 2025

Josh Semerene

Bib: 29610•M

FL

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0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:30
Rank: #15541
Start → 5K
24:30 | 7:53/mi
10K· 6.21 mi
48:36
Rank: #14950 (+591)
5K → 10K
24:06 | 7:45/mi
15K· 9.32 mi
1:13:10
Rank: #15076 (-126)
10K → 15K
24:34 | 7:54/mi
20K· 12.43 mi
1:37:42
Rank: #14763 (+313)
15K → 20K
24:32 | 7:54/mi
Half· 13.11 mi
1:42:55
Rank: #14674 (+89)
20K → Half
5:13 | 7:39/mi
25K· 15.53 mi
2:02:17
Rank: #14483 (+191)
Half → 25K
19:22 | 7:59/mi
30K· 18.64 mi
2:28:48
Rank: #14559 (-76)
25K → 30K
26:31 | 8:32/mi
20M
2:41:00
Rank: #14753 (-194)
30K → 20M
12:12 | 8:59/mi
21M
2:51:20
Rank: #15092 (-339)
20M → 21M
10:20 | 10:20/mi
35K· 21.75 mi
2:58:12
Rank: #15251 (-159)
21M → 35K
6:52 | 9:11/mi
23M
3:10:10
Rank: #15496 (-245)
35K → 23M
11:58 | 9:33/mi
24M
3:21:36
Rank: #16194 (-698)
23M → 24M
11:26 | 11:26/mi
40K· 24.85 mi
3:32:12
Rank: #17007 (-813)
24M → 40K
10:36 | 12:24/mi
25.2M
3:36:39
Rank: #17261 (-254)
40K → 25.2M
4:27 | 12:54/mi
Finish· 26.22 mi
3:47:59
Rank: #17830 (-569)
25.2M → Finish
11:20 | 11:07/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:55
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time2:05:04
Pace9:32 /mi
📊Positive Split: 21.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:3824:307:5324:30
7:53
-
10K
6.21 mi12:07:4448:367:4924:06
7:45
-0:08
15K
9.32 mi12:32:181:13:107:5124:34
7:54
+0:09
20K
12.43 mi12:56:501:37:427:5224:32
7:54
0:00
Half
13.11 mi13:02:031:42:557:515:13
7:39
-0:15
25K
15.53 mi13:21:252:02:177:5219:22
7:59
+0:20
30K
18.64 mi13:47:562:28:487:5926:31
8:32
+0:33
20M
20.00 mi14:00:082:41:008:0312:12
8:59
+0:27
21M
21.00 mi14:10:282:51:208:1010:20
10:20
+1:21
35K
21.75 mi14:17:202:58:128:126:52
9:11
-1:09
23M
23.00 mi14:29:183:10:108:1611:58
9:33
+0:22
24M
24.00 mi14:40:443:21:368:2411:26
11:26
+1:53
40K
24.85 mi14:51:203:32:128:3210:36
12:24
+0:58
25.2M
25.20 mi14:55:473:36:398:364:27
12:54
+0:30
Finish
26.22 mi15:07:073:47:598:4211:20
11:07
-1:47

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:39 /mi

Average Pace

8:42 /mi

Slowest Pace

12:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:02:17

54% of race

Time at Steady Pace

57:33

25% of race

Time at Slower Pace

48:09

21% of race

Average Pace: 8:42 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:43:3824:307:5324:30
7:53
#15541
10K
6.21 mi12:07:4448:367:4924:06
7:45
#14950
15K
9.32 mi12:32:181:13:107:5124:34
7:54
#15076
20K
12.43 mi12:56:501:37:427:5224:32
7:54
#14763
Half
13.11 mi13:02:031:42:557:515:13
7:39
#14674
25K
15.53 mi13:21:252:02:177:5219:22
7:59
#14483
30K
18.64 mi13:47:562:28:487:5926:31
8:32
#14559
20M
20.00 mi14:00:082:41:008:0312:12
8:59
#14753
21M
21.00 mi14:10:282:51:208:1010:20
10:20
#15092
35K
21.75 mi14:17:202:58:128:126:52
9:11
#15251
23M
23.00 mi14:29:183:10:108:1611:58
9:33
#15496
24M
24.00 mi14:40:443:21:368:2411:26
11:26
#16194
40K
24.85 mi14:51:203:32:128:3210:36
12:24
#17007
25.2M
25.20 mi14:55:473:36:398:364:27
12:54
#17261
Finish
26.22 mi15:07:073:47:598:4211:20
11:07
#17830
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi15541106411064115292(Top 54%)10506(Top 65%)10506(Top 186%)
10K6.21 mi3.10 mi14950+59110387+25410387+25414398(Top 51%)10173(Top 63%)10173(Top 180%)
15K9.32 mi3.11 mi15076-12610433-4610433-4615292(Top 54%)10506(Top 65%)10506(Top 186%)
20K12.43 mi3.11 mi14763+31310271+16210271+16214057(Top 49%)9898(Top 61%)9898(Top 175%)
Half13.11 mi0.68 mi14674+8910238+3310238+3312964(Top 46%)9471(Top 59%)9471(Top 168%)
25K15.53 mi2.42 mi14483+19110116+12210116+12213792(Top 49%)9659(Top 60%)9659(Top 171%)
30K18.64 mi3.11 mi14559-7610096+2010096+2014976(Top 53%)10048(Top 62%)10048(Top 178%)
20M20.00 mi1.36 mi14753-19410155-5910155-5916666(Top 59%)10667(Top 66%)10667(Top 189%)
21M21.00 mi1.00 mi15092-33910272-11710272-11719469(Top 69%)11813(Top 73%)11813(Top 209%)
35K21.75 mi0.75 mi15251-15910331-5910331-5919064(Top 67%)11528(Top 72%)11528(Top 204%)
23M23.00 mi1.25 mi15496-24510387-5610387-5618915(Top 67%)11400(Top 71%)11400(Top 202%)
24M24.00 mi1.00 mi16194-69810657-27010657-27024767(Top 87%)14178(Top 88%)14178(Top 251%)
40K24.85 mi0.85 mi17007-81310973-31610973-31625513(Top 90%)14527(Top 90%)14527(Top 257%)
25.2M25.20 mi0.35 mi17261-25411066-9311066-9324879(Top 88%)14191(Top 88%)14191(Top 252%)
Finish26.22 mi1.02 mi17830-56911301-23511301-23525586(Top 90%)14568(Top 90%)14568(Top 258%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

15292

Males

10506

M18-39

10506

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

14398

Males

10173

M18-39

10173

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

15292

Males

10506

M18-39

10506

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

14057

Males

9898

M18-39

9898

20K→Half

12.4 - 13.1 mi

Top 46%
×2stories
+19ft-37ft

Overall

12964

Males

9471

M18-39

9471

Half→25K

13.1 - 15.5 mi

Top 49%
×4stories
+66ft-88ft

Overall

13792

Males

9659

M18-39

9659

25K→30K

15.5 - 18.6 mi

Top 53%
×9stories
+181ft-148ft

Overall

14976

Males

10048

M18-39

10048

30K→20M

18.6 - 20.0 mi

Top 59%
×5stories
+64ft-50ft

Overall

16666

Males

10667

M18-39

10667

20M→21M

20.0 - 21.0 mi

Top 69%
×8stories
+106ft-24ft

Overall

19469

Males

11813

M18-39

11813

21M→35K

21.0 - 21.8 mi

Top 67%
×7stories
+17ft-86ft

Overall

19064

Males

11528

M18-39

11528

35K→23M

21.8 - 23.0 mi

Top 67%
×5stories
+23ft-63ft

Overall

18915

Males

11400

M18-39

11400

23M→24M

23.0 - 24.0 mi

Top 87%
×6stories
+12ft-82ft

Overall

24767

Males

14178

M18-39

14178

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

25513

Males

14527

M18-39

14527

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

24879

Males

14191

M18-39

14191

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2stories
+22ft-21ft

Overall

25586

Males

14568

M18-39

14568

Passing Analysis

Category:
Athletes Passed
2037
Passed By
4326
Net Change
-2289
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15541
5K → 10K692101+591#15541#14950
10K → 15K167293-126#14950#15076
15K → 20K37360+313#15076#14763
20K → Half967+89#14763#14674
Half → 25K26473+191#14674#14483
25K → 30K218294-76#14483#14559
30K → 20M80274-194#14559#14753
20M → 21M40379-339#14753#15092
21M → 35K31190-159#15092#15251
35K → 23M54299-245#15251#15496
23M → 24M4702-698#15496#16194
24M → 40K5818-813#16194#17007
40K → 25.2M6260-254#17007#17261
25.2M → Finish7576-569#17261#17830
TOTALS20374326-2289
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing